Toothbrush

ABSTRACT

A toothbrush is disclosed, in which wing hairs are arranged in a V-shape in left and right sides with respect to the center hairs which are the center toothbrush hairs planted in forward and backward directions in a toothbrush head, and the V-shaped wing hairs of the left and right sides are arranged in a X-shape, and auxiliary hairs are arranged between the forward and backward wing hairs in part of the X-shaped toothbrush hairs. With the above arrangements, a contact surface area of each tooth is widened, and a more effective tooth brushing can be performed in three fossas (mesial fossa (mesial pit), a central fossa (central pit) and a distal fossa (distal pit)), a buccal developmental groove, a lingual developmental groove, an accessory groove, a triangular groove and a buccal groove of a buccal aspect, which correspond to a dental caries portion, an interproximal space in which a food debris might be accumulated, and a contact area peripherals of a buccal aspect in which a food debris might be impacted, so dental caries and tooth diseases (periodontitis) can be advantageously prevented, and a pain due to a temporomandibular disorder and a facial muscle fatigue might be reduced and recovered by protruding a cushion layer from an upper side of a toothbrush.

CLAIM OF PRIORITY

This application makes reference to, incorporates the same herein, andclaims all benefits accruing under 35 U.S.C. §119 from an applicationearlier filed in the Korean Intellectual Property Office on 21 Dec. 2007and there duly assigned Serial No. 2007-0135327.

TECHNICAL FIELD OF THE INVENTION

The present invention relates to a toothbrush which is able tosignificantly reduce dental caries, periodontitis, pain due totemporomandibular disorder or the like which are known as three dentaldiseases, and in particular to a toothbrush featured in that wing hairsare arranged in a V-shape in left and right sides with respect to thecenter hairs which are the center toothbrush hairs planted in forwardand backward directions in a toothbrush head, and the V-shaped winghairs of the left and right sides are arranged in a X-shape, andauxiliary hairs are arranged between the forward and backward wing hairsin part of the X-shaped toothbrush hairs. With the above arrangements, acontact surface area of each tooth is widened, and a more effectivetooth brushing can be performed in three fossas (mesial fossa (mesialpit), a central fossa (central pit) and a distal fossa (distal pit)), abuccal developmental groove, a lingual developmental groove, anaccessory groove, a triangular groove of the occlusal aspect of themaxillomandibular molars and a buccal groove of a buccal aspect whichcorrespond to a dental caries portion, an interproximal space in which afood debris might be accumulated, and a contact area peripherals of abuccal aspect in which a food debris might be impacted, so dental cariesand tooth diseases (periodontitis) can be advantageously prevented, anda pain due to a temporomandibular disorder and a facial muscle fatiguemight be reduced and recovered by protruding a cushion layer from anupper side of a toothbrush.

DESCRIPTION OF BACKGROUND ART

Generally, as shown in FIG. 1, occlusal aspect of a human's molar isformed in a concave shape consisting of three fossas, buccaldevelopmental groove, lingual developmental groove, accessory groove,and triangular groove. The above fossa consists of mesial fossa, centralfossa and distal fossa formed in the outside of mesial pit, central pitand distal pit, respectively. The above fossas are linked via a centraldevelopmental groove and consist of a buccal developmental groove and alingual developmental groove extended from a central fossa (here, alingual developmental groove of the occlusal aspect of the maxillarymolar is extended from a distal fossa), and an accessory groove and atriangular groove extended from a mesial fossa, and an accessory grooveand a triangular groove extended from a distal fossa.

However, the conventional toothbrush is formed in a straight arrangementstructure in a leftward and rightward direction of a head, so a toothcontact surface area is narrow, and an effective tooth brushing workcannot be performed with respect to a concave portion of a molarocclusal aspect. In addition, it is impossible to effectively brush aninterproximal space in which a molar buccal aspect food debris isaccumulated, and a buccal contact area peripheral in which a food debrismight be impacted.

SUMMARY OF THE INVENTION

Accordingly, it is an object of the present invention to provide atoothbrush featured in that first a contact surface area of each toothis widened, and a more effective tooth brushing can be performed inthree fossas (mesial fossa (mesial pit), a central fossa (central pit)and a distal fossa (distal pit)), a buccal developmental groove, alingual developmental groove, an accessory groove, a triangular grooveof the occlusal of the maxillomanbular molars and a buccal groove of abuccal aspect which correspond to a dental caries portion, aninterproximal space in which a food debris might be accumulated, and acontact area peripherals of a buccal aspect in which a food debris mightbe impacted, so dental caries and tooth diseases (periodontitis) can beadvantageously prevented, and second a pain due to a temporomandibulardisorder and a facial muscle fatigue might be reduced and recovered byprotruding a cushion layer from an upper side of a toothbrush.

To achieve the above objects, there is provided a toothbrush featured inthat first through sixth toothbrush hairs having a X-shaped wing hairformed with respect to central hairs are arranged in parallel in theforward and backward directions of a toothbrush hair, and a toothbrushhair has straight wing hairs, and the above toothbrush hairs areconfigured to form a diamond shape with a curve and to widen in anoutward direction for thereby well matching with a structure that anaccessory groove and a triangular groove extended from a mesial fossa, acentral fossa and a distal fossa of maxillomandibular molars of anatural tooth are widened.

To achieve the above objects, there is provided a toothbrush which ischaracterized in that a central hair of each wing hair is formed in a +shape with its center being formed in a conical shape with a protrudedheight of 1-2 mm, and a central hair of each wing hair is formed in acircular shape with its center being formed in a conical shape with aprotruded height of 1-2 mm, and each central hair has a 2 mm intervalfrom its neighboring hair, and the length from a front wing hair of afirst toothbrush hair to a rear wing hair of a sixth toothbrush hair is1.7 cm, and a wing hair is less than a 2 mm interval from itsneighboring hair, and the widths between the front and rear wing hairsof the second and fifth toothbrush hairs is wider than the width of thefront and rear wing hairs of the first, third, fourth and sixthtoothbrush hairs, and the first through third toothbrush hairs areconfigured with their both ends being higher than their centers, andwith an asymmetrical curve configuration being formed with respect to a½ portion in one direction about the central axis, and fourth and sixthtoothbrush hairs are configured with their both sides being parallel andbeing inclined toward their central portions and being narrowed, and afront auxiliary hair is formed between the front and rear wing hairs ofthe second toothbrush, and the front and rear auxiliary hairs have thesame height and width as the central portion of the central hair and arespaced apart as much as the width of the central portion of the centralhair, and a rear auxiliary hair is formed between the front and rearwing hairs of the fifth toothbrush, and the rear auxiliary hair isconfigured with its height being gradually decreased in an outwarddirection, and a barrier wall is formed between the toothbrush hairs soas to prevent the inclination of toothbrush hair, and a toothbrush isformed of a plate body, and a plate body is formed of a rubber or agroup of hairs, and a dome shaped cushion layer is formed on an upperside of the toothbrush head, and a second cushion layer smoother thanthe first cushion layer is formed on an upper side of the first cushionlayer in a band shape.

EFFECTS

The present invention is advantageously characterized in that toothbrushhairs are arranged in a V-shape in left and right sides with respect toa central hair which is a central toothbrush hair in the forward andbackward directions of a toothbrush head, and the V-shaped toothbrushhairs of the left and right sides are arranged in a X-shape, and anauxiliary hair is arranged between the front and rear wing hairs of thesecond and fifth toothbrush hairs. The above construction well matcheswith a concave structure (fossa, accessory groove, triangular groove,buccal developmental groove, lingual developmental groove, buccal grooveof a buccal aspect) of a tooth which corresponds to a dental cariesportion. In addition, it is possible to more effectively remove theaccumulation of food debris and to more effectively brush aninterpoximal space having a poor brushing effect, and a contact areathat a food debris might be easily impacted therein.

In addition, a pain due to a temporomandibular disorder and a facialmuscle fatigue might be reduced and recovered by protruding a cushionlayer from an upper side of a toothbrush.

Since a barrier wall is formed between toothbrush hairs for therebypreventing an inclination of toothbrush hairs, and a toothbrush brandmight be formed therein.

BRIEF DESCRIPTION OF THE DRAWINGS

A more complete appreciation of the invention, and many of the attendantadvantages thereof, will be readily apparent as the same becomes betterunderstood by reference to the following detailed description whenconsidered in conjunction with the accompanying drawings in which likereference symbols indicate the same or similar components, wherein:

FIG. 1 is a view illustrating an occlusal aspect of maxillary first andsecond molars.

FIG. 2 is a plane view of the present invention.

FIG. 3 is an exemplary view of a second toothbrush hair among firstthrough third toothbrush hairs according to the present invention.

FIG. 4 is an exemplary view of a fifth toothbrush hair among fourththrough sixth toothbrush hairs according to the present invention.

FIG. 5 is an exemplary view of a central hair according to the presentinvention.

FIG. 6 is a side view of a molar for showing an application of a thirdtoothbrush hair among first through third toothbrush hairs according tothe present invention.

FIGS. 7 and 8 are views of a buccal aspect of a molar for showing anapplication of a toothbrush according to the present invention.

FIG. 9 is an exemplary view of first through third toothbrushesaccording to another embodiment of the present invention.

FIG. 10 is an exemplary view of fourth through sixth toothbrushesaccording to another embodiment of the present invention.

FIG. 11 is a plane view of another embodiment of the present invention.

FIG. 12 is a plane view of further another embodiment of the presentinvention.

FIG. 13 is a plane view of an upper structure of a toothbrush headaccording to the present invention.

FIG. 14 is a front view of FIG. 13.

DETAILED DESCRIPTION OF THE INVENTION

The preferred embodiments of the present invention will be describedwith reference to the accompanying drawings.

FIG. 2 is a view illustrating a toothbrush according to the presentinvention. As shown therein, the toothbrush comprises a head 10 featuredin that X-shaped first through sixth toothbrush hairs 11, 12, 13, 14, 15and 16 are arranged in parallel in forward and backward directions.Central hairs a1, a2, a3, a4, a5 and a6 are formed in the centers of thefirst through sixth toothbrush hairs 11, 12, 13, 14, 15 and 16,respectively. Front auxiliary hairs d1 and e1 are arranged in both sidesof the second toothbrush hair 12, and rear auxiliary hairs d2 and e2 arearranged in both sides of the fifth toothbrush hair 15.

The first toothbrush hair 11 is configured as a front wing hair b1 and arear wing hair b2 are arranged in series in a V-shape in one side of thecentral hair a1, and a front wing hair c1 and a rear wing hair c2 areformed in series in a V-shape in the opposite side, which are arrangedin a X-shape with respect to the central hair a1.

The second toothbrush hair 11 is configured as a front wing hair b3 anda rear wing hair b4 are arranged in series in a V-shape in one side ofthe central hair a2, and a front wing hair c3 and a rear wing hair c4are formed in series in a V-shape in the opposite side, which arearranged in a X-shape with respect to the central hair a2.

The front auxiliary hairs d1 and e1 are formed between the front andrear wing hairs b3 and b4, c3 and c4.

The third toothbrush hair 13 is configured as a front wing hair b5 and arear wing hair b6 are arranged in series in a V-shape in one side of thecentral hair a3, and a front wing hair c5 and a rear wing hair c6 areformed in series in a V-shape in the opposite side, which are arrangedin a X-shape with respect to the central hair a3.

The fourth toothbrush hair 14 is configured as a front wing hair b7 anda rear wing hair b8 are arranged in series in a V-shape in one side ofthe central hair a4, and a front wing hair c7 and a rear wing hair c8are formed in series in a V-shape in the opposite side, which arearranged in a X-shape with respect to the central hair a4.

The fifth toothbrush hair 15 is configured as a front wing hair b9 and arear wing hair b10 are arranged in series in a V-shape in one side ofthe central hair a5, and a front wing hair c9 and a rear wing hair c10are formed in series in a V-shape in the opposite side, which arearranged in a X-shape with respect to the central hair a5.

The rear auxiliary hairs d2 and e2 are formed between the front and rearwing hairs b9 and b10, c9 and c10.

The sixth toothbrush hair 16 is configured as a front wing hair b11 anda rear wing hair b12 are arranged in series in a V-shape in one side ofthe central hair a6, and a front wing hair c11 and a rear wing hair c12are formed in series in a V-shape in the opposite side, which arearranged in a X-shape with respect to the central hair a6.

The first through third toothbrush hairs 11, 12 and 13 among the firstthrough sixth toothbrush hairs 11, 12, 13, 14, 15 and 16 belong to thefront part 1, and the fourth through sixth toothbrush hairs 14,15 and 16belong to the rear part 11.

The central hairs a1, a2, a3, a4, a5 and a6 form a cross shape. As shownin FIG. 5, the central portions are formed in a conically protrudedshape with the central portion being configured to have a height 1-2 mmhigher than the height of the normal toothbrush hairs.

The construction that six central hairs a1, a2, a3, a4, a5 and a6 areprovided in a cross shape with their central portion being formed inconical shapes is provided for enhancing an adaptation with a mesialpit, a central pit and a distal pit, which correspond to a dental cariesportion and are positioned in the center portions of a mesial fossa, acentral fossa, and a distal fossa of the occlusal aspect of themaxillomandibular molars. The above construction might be adapted to abuccal groove which corresponds to a dental caries frequent area of abuccal aspect of the mandibular molars.

In the above construction, the first through sixth toothbrush hairs 11,12, 13, 14, 15 and 16 might be configured as each wing hair b1 and c2,b2 and c1, b3 and c4, b4 and c3, b5 and c6, b6 and c5, b7 and c8, b8 andc7, b9 and c10, b10 and c9, b11 and c12, and b12 and c11 is formed in astraight line shape or is formed in a curve shape as shown in FIGS. 9and 10. Since each wing hair b1 and b2, b3 and b4, b5 and b6, b7 and b8,b9 and b10 and b11 and b12 and each wing hair c1 and c2, c3 and c4, c5and c6, c7 and c8, c9 and c10 and c11 and c12 might be formed in aV-shape matching with each accessory groove and each triangular grooveof the occlusal aspect of the molar, they are preferably formed in astraight line shape or a curve shape.

As shown in FIG. 3, the second toothbrush hair 12 of the front part 1 isconfigured with the rear wing hairs b4 and c4 being higher in their bothsides, and with the centers being asymmetrically lower.

The central hair a2 is protruded from the center, and front auxiliaryhairs d1 and e1 are formed both sides of the center hair a2.

The front auxiliary hairs d1 and e1 are protruded in a rectangular shapeand are protruded with the same height as the central hairs a1, a2 anda3 for thereby effectively brushing the buccal groove of the buccalaspect of the maxillomandibular molars.

In addition, when brushing in the up and down directions with respect tothe buccal aspect of the maxillomandibular molars, it is possible toenhance cleanness of the buccal groove of the buccal aspect with thehelps of the protruded portions of the central hairs a1, a2 and a3.

The first and third toothbrush hairs 11 and 13 of the front part I areformed in the same configuration as the second toothbrush hair 12 exceptfor their widths.

The first through third toothbrush hairs 11, 12 and 13 are configuredwith their both sides being higher than the center and are configured inan asymmetrical shape with respect to a ½ portion in one directiondepending in the central axis.

As shown in FIG. 6, in case that the length of crown is 7.5 mm, thewidth from the height of contour of the buccal aspect to the cusp tip ofthe buccal aspect is 3.5 mm, the width from the height of contour of thebuccal aspect to the cervical line of the buccal aspect is 0.75 mm,since the straight distance from the cervical line of the buccal aspectto the cusp tip of the buccal aspect is 8 mm, the whole width of thesecond toothbrush hair 12 is set 8 mm, and it looks like a dome shapewhen viewing the outer appearance of the buccal aspect from the mesialaspect of the mandibular first molar. Since the curve of the buccalaspect is an asymmetrical curve with respect to a ½ portion in onedirection with based on the central axis, the first through thirdtoothbrush hairs 11, 12 and 13 are matched with the curve surface of thebuccal aspect, so an asymmetrical curve is obtained.

As shown in FIG. 6, in case of the molar, when the standard length ofthe crown is 7.5 mm, the straight distance from the cervical line of thebuccal aspect to the cusp tip of the buccal aspect is 8 mm, the wholewidth of each second toothbrush hair 12 is 8 mm. Since the curve surfaceof the buccal aspect is an asymmetrical curve surface with respect to a½ portion in one direction, an asymmetrical curve is assumed so as tomatch the first through third toothbrush hairs 11, 12 and 13 with thecurve surface of the buccal aspect.

In the above construction, since the buccal aspect of the molar isformed in an asymmetrical curve including the cervical third (⅓), whichis the height of contour, the first through third toothbrush hairs 11,12 and 13 are formed in an asymmetrical curve in a ½ portion in onedirection with respect to the central axis.

As shown in FIG. 4, the fifth toothbrush hair 15 of the rear part II isconfigured as the front wing hairs b9 and c9 are horizontal in theirboth sides and are narrowed following a sharp inclination to reach about2.3 mm in the buccal and lingual developmental grooves in a ⅓ portion(central fossa) of the lengths of the auxiliary hairs d2 and e2 of therear part and then form an inclined portion sharp toward the center ofthe central fossa while forming a line which connects the ends oftoothbrush hairs.

The central hair a5 is protruded from the center, and the auxiliaryhairs d2 and e2 of the rear part are formed in both sides of the centralhair a5.

The fourth and sixth toothbrush hairs 14 and 16 of the rear part 11 areformed in the same shape as the fifth toothbrush hair 15 except for thedifference in width.

In the above construction, the auxiliary hairs d2 and e2 of the rearpart are lowered in their heights with an inclination in both sides fromthe 1-2 mm point of the lower side in the tops of the central hairs a4,a5 and a6. The auxiliary hairs d2 and e2 of the rear part are configuredfor an effective tooth brushing work with respect to the buccal andlingual grooves of the occlusal aspect of the maxillomandibular molars.

In the above construction, when brushing the teeth with the auxiliaryhairs d2 and e2 of the rear part in the forward and backward directionswith the head 10, it is possible to enhance an adaptation with respectto the buccal and lingual developmental grooves of the occlusal aspectalong with reliable cleanness. In addition, when brushing in the leftand right directions, it is possible to enhance an adaptation withrespect to the buccal and lingual developmental grooves of the occlusalaspect.

The heights of the auxiliary hairs d2 and e2 of the rear part arelowered with a certain inclination in both sides with respect to the 1-2mm point of the lower side from the top of the central hair a5 forthereby well being matched with the buccal and lingual developmentalgrooves which are raised with an inclination in the directions of thebuccal and lingual aspects from the central fossa of the actual teeth.

In the above construction, the first through six toothbrush hairs 11,12, 13, 14, 15 and 16 might be formed of plate bodies or rubber platebodies or might if necessary be formed of the groups of hairs.

As shown in FIGS. 11 and 12, a barrier wall 18 formed of a plastic orrubber material is formed between the toothbrush hairs 11, 12, 13, 14,15 and 16 of the head 10, and a toothbrush brand might be formedtherein.

The barrier wall 18 has a height of about 3 mm from the surface of thehead for thereby preventing the inclination of the toothbrush hairs 11,12, 13, 14, 15 and 16 for thereby effectively preventing the inclinationof the same.

As shown in FIGS. 13 and 14, a dome shaped first cushion layer 19 isformed on the upper side of the head 10, and a second cushion layer 19 aformed in a band shape might be further formed on the upper side of thefirst cushion layer 19. The first cushion layer 19 is preferably formedof a soft rubber, and the second cushion layer 19 a is preferably formedof a very soft rubber.

In the above construction, the second cushion layer 19 a is made of arubber softer than that of the first cushion layer 19 for minimizinguneasy feeling with respect to a mucous membrane of an inner side of thesoft cheek.

The first and second cushion layers 19 and 19 a are configured to reducethe pains of users who suffer from a temporomandibular disorder in themuscle due to a mental stress, while helping the facial muscle fatiguerecovery of the users who work using facial muscles.

In the above constructions according to the present invention, the firstthrough third toothbrush hairs 11, 12 and 13 of the front part I and thefourth through sixth toothbrush hairs 14, 15 and 16 of the rear part IIcan be used for effectively brushing the occlusal aspect and buccalaspect of the maxillomandibular molars for thereby preventing dentalcaries and reliably removing the food debris between the teeth and gum.

Since a barrier wall 18 is formed between the toothbrush hairs 11, 12,13, 14, 15 and 16, it is possible to form a brand of a toothbrush, andit is possible to prevent an inclination of the toothbrush hairs.

Since the first and second cushion layers 19 and 19 a are protruded fromthe upper side of the head 10, a cheek massage function can beperformed. In addition, it is possible to obtain a pain reduction oftemporomandibular by prompting the removal of pain substance and wastesby massaging the muscles stressed by over mental stress with the helpsof a tooth brushing work and a cheek massaging and stretching functionwith respect to the patients who suffer from temporomandibular. When thepresent invention is adapted to a user who needs a lot of conversationwith others (for example, teacher), it is possible to help recover thefacial muscle fatigues due to a facial muscle extension effect duringtooth brushing.

The first through sixth toothbrush hairs 11, 12, 13, 14, 15 and 16 areformed in the head 10 of the present invention is a V shape or a Xshape, and the central hairs a1, a2, a3, a4, a5 and a6 are formed in thecenters of the toothbrush hairs 11, 12, 13, 14, 15 and 16. Here, thecentral hairs a1, a2, a3, a4, a5 and a6 are marched with six fossas ofthe occlusal aspect of the maxillomandibular first and second molars,respectively.

So, it is possible to more cleanly brush the mesial fossa (mesial pit),central fossa (central pit) and distal fossa (distal pit) with the helpsof the central hairs a1, a2, a3, a4, a5 and a6. In addition, it ispossible to more cleanly brush the buccal developmental groove, lingualdevelopmental groove, accessory groove, triangular groove and buccalgroove of the buccal aspect with the helps of the front and rear winghairs and auxiliary hairs of each toothbrush hair.

The wing hairs b1 and b2, b3 and b4, b5 and b6, c1 and c2, c3 and c4,and c5 and c6 of the front part I allow the wider contact surface areaof the buccal aspect of the maxillomandibular molars.

The widths of the wing hairs b2 and b3, b4 and b5, c2 and c3, and c4 andc5 are below 2 mm, so it is possible to more reliably brush theinterproximal space which has a lot of food debris accumulation.

As shown in FIGS. 7 and 8, the wing hairs b2 and b3, b4 and b5, c2 andc3, and c4 and c5 are configured to more effectively brush the contactarea between the teeth. When it is adapted to the buccal aspect of themaxillomandibular molars, the interproximal space (space portion betweenteeth) of the lower side of the contact area of the buccal aspect of themaxillomandibular first and second molars is configured based on thedistance from the cervical line (boundary of crown and tooth root) tothe cervical line of the neighboring teeth. The width of the spacebetween the maxillary first molar and the maxillary second molar is 2.0mm, and the width of the space between the mandibular first molar andthe mandibular second molar is 2.2 mm.

Since the cervical line is covered by gum, the width of theinterproximal space of the low side of the contact area of buccal aspectof molars corresponds to the width of the gingival line (boundary ofcrown and gum) between neighboring teeth, and the width of the gingivalline between the neighboring teeth is narrower than the cervical line.The width of the space between the teeth is getting narrower in theupward direction. When the width of each wing hair b2 and b3, b4 and b5,c2 and c3, and c4 and c5 are below 2 mm, wing hairs with interval beingbelow 2 mm might be efficiently used for thereby enhancing a cleannessin space between the teeth having a lot of food debris. So, it ispossible to more effectively brush the contact area of the buccal aspectin which the food impaction occurs.

The wing hairs b2 and c2 allow a more effective brushing operation withrespect to the rear most portion (distal aspect) of themaxillomandibular molars.

The wing hairs b7 through b12 and c7 through c12 of the rear part 11 isconfigured as the accessory groove and the triangular groove extendedfrom the mesial fossa, the central fossa, and the distal fossa to thebuccal direction and the lingual direction of the occlusal aspect areformed in a V shape, so it is possible to more effectively brush theocclusal aspect of the maxillomandibular molars along with an advantagethat approaching is easier than a conventional toothbrush.

For example, when brushing the teeth in the forward direction, it ispossible to effectively brush the accessory groove in the mesial slopeof the cusp and the distal triangular groove of the occlusal aspect withthe helps of the front wing hairs b7, b9, b11 and c7, c9, c11. Whenbrushing the teeth in the backward direction, it is possible to moreeffectively brush the accessory groove in the distal slope of the cuspand the mesial triangular groove of the occlusal aspect with the helpsof the rear wing hairs b8, b10, b12 and c8, c10, c12. Brushing the teethin the left and right directions is effective as well.

In the above operation, the portions between the wing hairs b3 and b4,c3 and c4, b9 and b10 and c9 and c10 are widened to form a V shape, sothe width between the accessory grooves extend from the central fossa iswider than the width between the accessory groove and triangular grooveextend from mesial and distal fossa, whereby it is possible to obtain awider angle depending on the widths of the accessory groove of theocclusal aspect of the maxillomandibular molars of the actual naturalteeth.

The front and rear auxiliary hairs d1 and e1, d2 and e2 are formedbetween the wing hairs b3 and b4, c3 and c4, b9 and b10, and c9 and c10,so the front auxiliary hairs d1 and e1 are applied to the buccal grooveof the buccal aspect along with the central hair a2 when brushing thebuccal aspect of the maxillomandibular molars with respect to the head10 in the left and right directions for thereby enhancing cleanness. Therear auxiliary hairs d2 and e2 are applied to the buccal developmentalgroove and lingual developmental groove of the occlusal aspect whenbrushing the occlusal aspect of the maxillomandibular molars withrespect to the head 10 in the forward and backward directions or in theleft and right directions for thereby enhancing cleanness.

In the above operation, the auxiliary hairs d1 and e1 of the front parthave the same heights as the central hair a2, and the auxiliary hairs d2and e2 of the rear part are configured with their heights being loweredwith an inclination with respect to the lower 1-2 mm portion from thetop of the central hair a5.

In other words, as shown in FIG. 6, the front part I of the head 10 isformed of an asymmetrical curve connecting the end lines of thetoothbrush hair with respect to an outer look of the length of the crownfrom the cervical area of the buccal aspect of the mandibular firstmolar to the buccal cusp tip. So, when brushing the teeth, an idealadaptation can be obtained with respect to the buccal aspect of themaxillomandibular molars. It is possible to effectively brush the buccalaspect of the maxillomandibular molars and the gum boundaries (gingivalline).

For reference, when adapting to the buccal aspect of the mandibularfirst molar using the curve which connects the ends of the toothbrushhairs with respect to the buccal aspect of the maxillary first molar,the maxillary first molar is has a more straight buccal aspect curve(contour) as compared to the mandibular first molar, so it has a pooradaptation to the buccal aspect of the mandibular molar, and a cervicalarea adaptation is degraded. The reason that the maxillary first molarhas a more straight buccal aspect curve as compared to the mandibularfirst molar because the lengths of the crowns of the maxillomandibularmolars are same as 7.5 mm But the width from the height of contour ofthe buccal aspect of the mandibular first molar to the cusp tip of thebuccal aspect is 3.5 mm, but the maxillary first molar is 2.2 mm. Thewidth from the height of contour of the buccal aspect of the mandibularfirst molar to the cervical line of the buccal aspect of the mandibularfirst molar is 0.75 mm, but the maxillary first molar is 0.5 mm Inaddition, the straight distance from the cervical line of the buccalaspect of the mandibular first molar to the cusp tip of the buccalaspect is 8 mm, but the maxillary first molar is 7.7-7.8 mm.

In addition, the mandibular first molar has an internal upwardinclination, whereas the maxillary first molar is an external downwardinclination.

In the rear part 11, the accessory groove connected from the mesialfossa, central fossa and distal fossa to the cusps in the occlusalaspect of the maxillomandibular molars of an actual natural tooth, andthe triangular groove connected from the mesial fossa and distal fossato the mesiodistal marginal ridges are connected in part up to about ⅓of the width of the buccal and lingual developmental groove like theconnecting buccal developmental groove and lingual developmental grooveor accessory groove or are neighboring very closely, and then are formedat the same height as the auxiliary hairs d2 and e2 of the rear parttill about ⅓ of the length of the auxiliary hairs d2 and e2 of the rearpart with respect to the lower 1-2 mm point from the top of the centralhair a5. In addition, they are downwardly widened depending on the depth(1.5 mm) and the width (5 mm) of the intercuspital space and are formedhorizontally after escaping from the depth and width of theintercuspital space (depending on the shape that accessory grooves andthe mesiodistal triangular grooves are upwardly connected), so that itis possible to more effectively brush the accessory groove andtriangular groove of the occlusal aspect of the maxillomandibular molarsof an actual natural tooth.

The front part I has a width of 8 mm with respect to the width of thetoothbrush hair in the left and right directions about the head 10.Here, the width of 8 mm is set so as to be adapted to the straightdistance from the cervical line of the buccal aspect of the mandibularfirst molar to the cusp tip of the buccal aspect.

The rear part II is configured as the toothbrush has a width of 9 mm inthe left and right directions with respect to the head 10. The width of9 mm is preferably set as 2 mm are added by 1 mm, twice, which is thewidth of the cusp of the buccal and lingual cusps, to 5 mm of thedistance between the buccal and lingual cusps of the occlusal aspect ofthe maxillomandibular molars, and then 2 mm are further added by 1 mm,twice, to the same in consideration of the widened width of the buccaland lingual cusps as the cusp tip occurs due to mastication operation.

The rear part II might be well adapted to all types of occlusal aspectfrom a young age to an old age.

The lengths of all the toothbrush hairs of the front and rear parts Iand II are set 1.7 cm. The above length is set as the width of 1 mm ofthe mesial marginal ridge of the occlusal aspect of the maxillary firstmolar and the distal marginal ridge of the occlusal aspect of themaxillary second molar is subtracted from the value obtained by adding0.9 mm of the mesiodistal diameter of crown of the maxillary secondmolar to 10 mm of the mesiodistal diameter of crown of the maxillaryfirst molar.

In addition, a more reliable toothbrush brushing contact with thesurfaces of teeth can be implemented by adapting the value, which isobtained by subtracting the widths of the mesial marginal ridge of theocclusal aspect of the mandibular first molar and the distal marginalridge of the occlusal aspect of the mandibular second molar from thevalue obtained by adding the mesiodistal diameter of crown (11.0 mm) ofthe mandibular first molar and the mesiodistal diameter of crown (10.5mm) of the mandibular second molar adapting to the relatively shorterlengths of the maxillary molars rather than adapting to the relativelylonger lengths of the mandibular molars when determining the lengths ofthe toothbrush hairs, because as the toothbrush is repeatedly used, itis worn out and widened, so it is preferred to have the length of 1.7 mmwhich is proper for brushing the maxillary first and second molars.

It is preferred that the distances between the central hairs a1, a2, a3,a4, a5 and a6 is 2 mm, respectively. Since the distance is matched withthe distance from the mesial fossa to the central fossa of the occlusalaspect of the maxillomandibular molars of an actual natural tooth, andthe distance from the central fossa to the distal fossa, a clean toothbrushing can be possible with the helps of an ideal approach.

As the present invention may be embodied in several forms withoutdeparting from the spirit or essential characteristics thereof, itshould also be understood that the above-described examples are notlimited by any of the details of the foregoing description, unlessotherwise specified, but rather should be construed broadly within itsspirit and scope as defined in the appended claims, and therefore allchanges and modifications that fall within the meets and bounds of theclaims, or equivalences of such meets and bounds are therefore intendedto be embraced by the appended claims.

1. A toothbrush comprising first and sixth toothbrush hairs that arearranged in parallel in the forward and backward directions with theirwing hairs being formed in an X shape with respect to a central hair. 2.The toothbrush of claim 1, wherein said first and sixth toothbrush hairsare configured with each wing hair being formed straight.
 3. Thetoothbrush of claim 1, wherein said first and sixth toothbrush hairs areconfigured with each wing hair being widened in an outward direction asbeing formed in a curve shape.
 4. The toothbrush of claim 1, whereinsaid central hair of each wing hair is protruded by 1-2 mm while beingformed in a cross shape with its center being formed in a conical shape.5. The toothbrush of claim 4, wherein said central hair of each winghair is protruded by 1-2 mm while being formed in a circular shape withits center being formed in a conical shape.
 6. The toothbrush of claim4, wherein said central hairs are arranged at an interval of 2 mm,respectively.
 7. The toothbrush of claim 1, wherein the length from awing hair of a front part of the first toothbrush hair to a wing hair ofa rear part of the sixth toothbrush hair is 1.7 cm.
 8. The toothbrush ofclaim 1, wherein said neighboring wing hairs are formed in a diamondshape with their intervals being less than 2 mm.
 9. The toothbrush ofclaim 1, wherein a width between the wing hairs of the front and rearparts of the second and fifth toothbrush hairs is wider than the widthof the wing hairs of the front and rear parts of the neighboringtoothbrush hairs.
 10. The toothbrush of claim 1, wherein said fourththrough sixth toothbrush hairs form a line connecting the ends oftoothbrush hairs and are configured with their both ends beinghorizontal and being narrowed with a high inclination to reach a ⅓portion of the length from a central fossa to buccal and lingualdevelopmental grooves and being sharply inclined toward the center ofthe central fossa.
 11. The toothbrush of claim 1, wherein said firstthrough third toothbrush hairs are configured with their both ends beinghigher than the center portion in an asymmetrical curve with respect toa ½ portion in one direction based on a central axis.
 12. The toothbrushof claim 1, wherein an auxiliary hair of the front part is formedbetween the wing hairs of the front and rear parts of the secondtoothbrush hair.
 13. The toothbrush of claim 12, wherein said auxiliaryhair of the front part has the same height and width as the centralportion of the central hair and are spaced apart as much as the width ofthe central portion of the central hair.
 14. The toothbrush of claim 1,wherein an auxiliary hair of the rear part is formed between the winghairs of the front and rear parts of the fifth toothbrush hair.
 15. Thetoothbrush of claim 14, wherein said auxiliary hair of the rear part isconfigured with its height being lowered in an outward direction. 16.The toothbrush of claim 1, wherein a barrier wall is protruded betweenthe toothbrush hairs for preventing an inclination of the toothbrushhairs.
 17. The toothbrush of claim 1, wherein said toothbrush hair isformed of a plate body.
 18. The toothbrush of claim 17, wherein saidplate body is formed of rubber or a group of hairs.
 19. A toothbrush,comprising: a first cushion layer which is formed on an upper side of atoothbrush head in a dome shape; and a second cushion layer which isformed on an upper side of the first cushion layer in a band shape andis made of a certain material softer than that of the first cushionlayer.